EPA promulgated standards for specific types of treatment, storage and disposal units including containers, tanks, surface impoundments, waste piles, land treatment units, landfills, incinerators, underground injection wells and research, development and demonstration facilities. However, some hazardous waste management technologies were not covered by these existing permitting standards. Owners and operators of facilities utilizing these technologies could not obtain the Resource Conservation and Recovery Act (RCRA) permits necessary to operate these miscellaneous units.

Under Subpart X of Part 264 in Title 40 of the Code of Federal Regulations, EPA proposed a new set of standards for owners and operators of new and existing hazardous waste management units not covered under existing regulations. EPA proposed to allow the Agency, and the States that adopt equivalent authorities, to issue permits to miscellaneous waste management units. The proposed standards covered environmental performance standards, monitoring, analysis, inspection, response, reporting and post-closure care among other requirements.

• Hazardous Waste Management System; Standards for Owners and Operators of Miscellaneous Units, Federal Register Notice (PDF)(14 pp, 2 MB, November 7, 1986, FR Vol. 51, No. 216)